Tire jbactkot-litg



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TIRE mxcnou LUQ. APPL 'ICATION FILED OCT. 2| NIB.

1,315,688. PatentedSept. 9,1919.

1' new role; 6?. w 5M1 lili at the tread oil. the wheel;

all! whom it wmy con/0m n Be it known that l, (license W. t'iIiIITH, it

citizen oi the United htates, residing at Dallas, in the county of Dulles and State oil" Clcxzisl have invented eel-tam. new and uselul flmpmovements in 'lire Traction.dmgs,

of which the following is n specification.

'lh'is invcntioiii relates to new and iieeil'iiil iinpi'o\cmciite in tile ti'iictloii h1g2 The invention has; to do with device."

transversely mrouiid the tire and telly the wheel. This member or lug has on each side a laterally directed Wedge-shcpedeei' o1 Pl'OjGCtll'H. with its reduced end oredge whereby it lends traction to the 'x'heel but easily withdii'ztws from. a, soft road-bed in which it is embedded. 'llhe' tread ed; oil? the care may he notched to prevent hitei'el dii'splecomenit' of the wheel. H

The invention will be TllOl'B readily understood from a. reading of the followiegepech ficntioii and by reference to the accompanying drawings, in which {in example of; the invention is shown and whereii iz l igui-e 1 is :1, partial side elevation ol'ie wheel showing lugs cons'x-iicted in accordance with this invention, attached to thetiie l i tzuned 'l'l'Olll the meet tout. .lhe tieed 'lnentzwy edge View oil? the thciceo'l" him 52 is it 'f'l' 2M m1: A wheel, SllOWll'l' my device :ippiied thereto,

Fig:v 4 is an enlarged detail of the hig detached.

ln the drawings the nuiiiel'ei i. deemed e Yoke-shaped tread memhei: which is lIQl'llJllRltlUg each in it lioee ll. lEech boss 3 also forms the imee ol li Wedgie-ehepecl em extending; iedielly towziifd led. oil;

ilIllll-Ll, (l1? DIlJCilLL.

tipecifice time of Lc'ttere l'teteiit.

sitioh, the inflation o 't -end-n'lembel' l on the c he. ward withi'elution to the surface .sti 'ect or road or the floor oi? e gill? {edges of the tread member may be rounded and. this member may he made compe're Eleriel lilo.

the member as Well as literally thereitl'cm. The cars are oppositely disposed mid. have their outer edges extending); froiil the our ter of the tread member so es to form sub-- stentially e cojntiiiiioue ei'cuzite, 'tmiisvciee tread edge which enters the med, south as the wheel revolves. The clue 3 extent laterally from the the will act similar to the paddles on it pixopellel' heel :iiid thee the tire cannot slip end the wheel of the moti'iir vehicle is given traction through the soft road-bed in which it ie eiiiheddcd. lithe tread edges ol the ears may he provided with notches 5' to prevent lateral displacement commonly called 'skiddiiig.

The bosses 3 are recessed to receive the eerso of clamps "I. The ears 8 are pivoted in the "bosses on. pins 8, whereby hingejoints are formed. The bosses are located on each side of the rim 9 of the wheel and theiclempsere curved and. elf-set inward to he e 'i'iiiiged inwardly oi the rim and.

agei11st?the sides oi: the telly l0. -Eech clamp termii ittes in e lug l1 overhanging the;inner ciicuinference of thefelly. it bolt 12 .faetez'is'the' lugs together trans.

f'iyerd. ln placing the tread member it iney he iie'ce'seiiy to deflate the tire, but this is after the clamps are lztstened in pohe tire, will, seet the 11; so that it will not creep. 01' rock. A plurality ot these 1; on a. Wheel and good llllS iiiziybe used ii'lt's have iocen oliedges of the ears being curved inward with relation to the center oi? the-"whc-rel or upsupportll pa ed in? the wheel, will not engage W re. the

'ti 'velythin. lit will be obvious that a wheel equipped with these lugs cannot become bogged or stuck in a soft reed bed, such we suiid or mud end traction "Will he heel in snow and slush] The wedgershepe oi the cars is important as it ei'iiihles the eel? to readily ehtei' the rotidrl. ed teed me e Vll till

withdraw with the least resistance. It. is obvious that the elements 7 may slide upon the telly 10, thus allowing the device- 'to move inwardly with the tire, when it is C0111 pressed.

What I claim is:

A tire traction device, comprising a 1011' gitudinally curved plate to be arranged transversely of a pneumatic tire, said plate tapering toward its ends, said plate being provided in its tread portion with serrations extending transversely of the plate and in the plane of rotation of the Wheel, wedge-shaped ears arranged upon opposite sides of the tire and extending radially With relation to the wheel, said Wedge-shaped ears increasing in width outwardly and rigidly secured to the curved plate to reinforce and stiffen the same, said ears be-.

GEORGE W. SMITH. 

